import java.util.Scanner;
public class code014{
	public static void main(String[] args){
		Scanner input = new Scanner(System.in);
		System.out.print("第一次输入的数:\n");
		int yi = input.nextInt();
		System.out.print("第二次输入的数:\n");
		int er = input.nextInt();
		     int diffen;
          double avg;
          diffen = yi - er;
          System.out.println("yi - er" + diffen);
          diffen = yi + er;
          System.out.println("yi + er" + diffen);
          diffen = yi * er;
          System.out.println("yi * er" + diffen);
          diffen = yi / er;
          System.out.println("yi / er" + diffen);

	}

}
